Advertisements What is the audio level supposed to be on a Series One TIVO and how can I increase it? When I take the audio to an MAudio Flying Cow the level meter shows it is extremely low and when I ampliify it within the ADC I get an annoying artifact that sounds like a low frequency "purr - purr - purr- purr" with each purr about 1 second duration. Like a pendulum swinging back and forth - purr - purr. I think if I can increase the audio level output from the TIVO just below where it would be clipped it may eliminate the artifact. I changed the sound effect volume to loud but that had no impact on the regular audio output level. Is there a way to boost the audio output level?